531321023213 has 8 divisors (see below), whose sum is σ = 545088548928. Its totient is φ = 517728880224.

The previous prime is 531321023209. The next prime is 531321023237. The reversal of 531321023213 is 312320123135.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 531321023213 - 2² = 531321023209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531321023243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43839545 + ... + 43851662.

It is an arithmetic number, because the mean of its divisors is an integer number (68136068616).

Almost surely, 2^531321023213 is an apocalyptic number.

It is an amenable number.

531321023213 is a deficient number, since it is larger than the sum of its proper divisors (13767525715).

531321023213 is an equidigital number, since it uses as much as digits as its factorization.

531321023213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87691363.

The product of its (nonzero) digits is 3240, while the sum is 26.

Adding to 531321023213 its reverse (312320123135), we get a palindrome (843641146348).

The spelling of 531321023213 in words is "five hundred thirty-one billion, three hundred twenty-one million, twenty-three thousand, two hundred thirteen".